Chapter 15, Problem 104A

Heat was added consistently to a sample of water to producethe heating curve in Figure 15.26. Identify what is happening in Sections 1, 2, 3, and 4 on the curve.

Interpretation Introduction

Interpretation:

The phases of water in section 1, 2, 3 and 4 needs to be determined.

Concept introduction:

By adding heat one can can change the phase of any substance.

Answer to Problem 104A

When heat was added consistently to a sample of water to produce the heating curve as shown in the figure 15.26, there are 4 different phase.

Explanation of Solution

There are 4 different phases to the heating curve. These are as follows:

1. Solid ice is heated and the temperature increases until normal or freezing temperature is reached that is ${\text{0}}^{\text{o}}\text{C}$ is reached.

2. Then the melting phase as temperature increases.

3. As the substances melts, it becomes liquid and the temperature of the substance begins increases as it absorbs heat.

4. As the substances reaches certain temperature it starts boiling, here the temperature will again be constant.

Conclusion

Water can be changed to different phases like solid, liquid and gas by adding or decreasing heat from it.